Pytania o kwarc deformacyjny i szokowy

• Authors: Romuald Kosina

Title variants

EN

Questions about deformed and shocked quartz

• Languages of publication: PL

Abstracts

EN

Quartz, known as a common mineral on our planet, is used as a good marker of microstructural deformation created by tectonic activity or meteorite impact. Planar fractures (PFs) and planar deformation features (PDFs) are not randomly oriented in an impacted quartz crystal, but are distinctly connected to crystallographic planes. In a tectonically deformed quartz PDFs are mostly parallel to the plane (0001), but can also be bent. Recrystallization reduces the level of dislocations in such a quartz. However, the difference between both types of quartz is quantitative and not qualitative. One might expect that the impact could reactivate or induce new tectonic metamorphism and/or volcanic activity. In addition, P-T parameters decrease continuously from the impact centre toward outside. Then, intermediate forms of quartz deformation ought to be distinguished. The paper also presents the point of view that the location and identification of deformed and shocked quartz, as well as some allochtonic Scandinavian impactites, transported into the Central Europe during the last glaciation, is highly probable in areas of enhanced tectonic activity in Lower Silesia, Poland. Identification of local rocks with pseudotachylite properties and recognition of their nature, deformed versus shocked, could also be helpful here.

Keywords

EN

deformation; impact; local vs allochtonic origin; meteorites; microstructure; quartz

Discipline

• GEOPHYSICS: GEOPHYSICS

• Publisher: Polskie Towarzystwo Meteorytowe
• Journal: Acta Societatis Metheoriticae Polonorum
• Year: 2014
• Volume: 5
• Pages: 52-71

Contributors

author

Romuald Kosina

• Instytut Biologii Eksperymentalnej, Uniwersytet Wrocławski

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• Document Type: article